Allergic reactions to medications like Tazzle (tadalafil) are rare but possible. If you experience any of the following symptoms after taking Tazzle, it could indicate an allergic reaction, and you should seek medical attention immediately: Skin Rash or Hives: This may appear as red, itchy patches on the skin or raised welts. Swelling: Particularly of the face, lips, tongue, or throat. This can be severe and may lead to difficulty breathing. Difficulty Breathing: This can include shortness of breath, wheezing, or tightness in the chest. Dizziness or Fainting: These symptoms may indicate a drop in blood pressure, which can be a sign of a severe allergic reaction. Nausea or Vomiting: Some people may experience gastrointestinal symptoms as part of an allergic reaction. If you suspect you're having an allergic reaction to Tazzle or any medication, stop taking it immediately and seek emergency medical attention. If left untreated, severe allergic reactions can be life-threatening. Additionally, inform your healthcare provider about the reaction so that they can note it in your medical records and advise you on alternative treatments.